MAX5527GTA+T Maxim Integrated Products, MAX5527GTA+T Datasheet - Page 7

• Manufacturer Part Number: MAX5527GTA+T
• Description: IC POT DGTL 1TIME PROGR 8-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX5527GTA+T

• Taps: 64
• Resistance (ohms): 100K
• Number Of Circuits: 1
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: Up/Down
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Resistance In Ohms: 100K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX5527/MAX5528/MAX5529 100kΩ/50kΩ/10kΩ
end-to-end resistance digitally-controlled potentiome-
ters offer 64 wiper tap positions accessible along the
resistor array between H and L. These devices function
as potentiometers or variable resistors (see Figure 1).
The wiper (W) position is adjusted sequentially through
the tap positions using a simple 2-wire up/down inter-
face. These digital potentiometers provide an optional
one-time programmable feature that sets and locks the
power-on reset position of the wiper (see the PV One-
Time Programming section). Once the desired wiper
position is programmed, the 2-wire interface can be
disabled to prevent unwanted adjustment.
The MAX5527/MAX5528/MAX5529 provide two modes
of operation when the serial interface is active: incre-
ment mode or decrement mode. The serial interface is
only active when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. Set U/D high to increment the
MAX5527/MAX5528/MAX5529 when CS transitions
from high to low (Figure 2). Set U/D low to decrement
the MAX5527/MAX5528/MAX5529 when CS transitions
high to low (Figure 3). Once CS is held low, each low-
to-high transition at U/D increments or decrements the
wiper one position. Once the increment or decrement
PIN
One-Time Programmable, Linear-Taper Digital
—
1
2
3
4
5
6
7
8
NAME
GND
V
U/D
CS
_______________________________________________________________________________________
PV
EP
W
H
DD
L
Digital Interface Operation
Detailed Description
Wiper Connection
Chip-Select Input. A high-to-low CS transition determines the increment/decrement mode. Increment
if U/D is high, or decrement if U/D is low. CS is also used for one-time programming. See the PV One-
Time Programming section.
Supply Voltage. Bypass with a 0.1µF capacitor to GND.
Ground
One-Time Programming Voltage. Connect PV to an 11V supply at the time the device is
programmed/locked, and bypass with a 22µF capacitor to GND. For normal operation, connect to
GND or leave floating.
Up/Down Control Input. When CS is low, a low-to-high transition at U/D increments or decrements the
wiper position. See the Digital Interface Operation section.
Resistor Low Terminal
Resistor High Terminal
Exposed Pad (TDFN Only). Internally connected to GND. Connect to a large ground plane to
maximize thermal dissipation.
mode is set, the device remains in that mode until CS
goes high.
Idle U/D high for normal operation. If U/D is low when
CS transitions low to high, the wiper moves one addi-
tional tap in its present direction. The wiper remains in
the same position when U/D is high and CS transitions
low to high. After CS returns high, the wiper position
remains the same (Figure 4).
Additional increments do not change the wiper position
when the wiper is at the maximum end of the resistor
array. Additional decrements do not change the wiper
position when the wiper is at the minimum end of the
resistor array.
Figure 1. Potentiometer/Variable-Resistor Configuration
FUNCTION
POTENTIOMETER
CONFIGURATION
H
L
Potentiometers
W
VARIABLE-RESISTOR
CONFIGURATION
Pin Description
H
L
W
7